Unfortunately this will give an error if olddata does not already exist, so you would need to do some capturing first or import or create a minimal dataset. You can enter any python numpy expression when creating new datasets based on old. You can then plot newdata rather than olddata. How do I control the spaces between markers in a plot so that it although I am plotting say a 100,000 points but it shows markers at only sample points. "newdata", choose data from expression, then enter an expression in the value text edit such asĪnd put this in the error text edits if your dataset has error bars. What you can do to simulate this is to create a new dataset based on a previous one but only having 300 values. There's no explicit option for only storing the last X values - it would be a good thing to add to the program and probably wouldn't be too hard to do. Sorry for the delay in replying - I'm a bit busy at work at the moment. I'm looking to just read the last data written to a file (say the last 300 lines) and graph just that (no need to store previous data either). I see there's a capture option with auto-updating, which looks great. Jeremy Sanders, author of Veusz responded to an email asking about Veusz: It is cross-platform, can auto-update from a data source, but is not explicitly set up to display realtime data. Veusz looks like a promising means to display data. R - (statistics package, graphing and data analysis) forum post on using GnuPlot for real time plotting: RRDTool - (needs script to upate database, writes graph to file, for e.g. Kst - (Linux/Windows, please report back if you get this working, looks powerful)
Edit plot in veusz software#
Advantages/disadvantages of each package or new software options should be added below.
The following are possible process control and visualization software that might be adapted to work with the GCU.
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